provision-vm

#!/usr/bin/env bash

set -eo pipefail

ram=1024
cpus=2
storage=/
disk=16
graphics=vnc,password=abc
blocking=--wait=-1
os=debian

while getopts ":r:c:smd:htWo:i" opt; do
        case $opt in
                r ) ram=$OPTARG;;
                c ) cpus=$OPTARG;;
                s ) storage=ssd/;;
                m ) storage=magnetic/;;
                d ) disk=$OPTARG;;
                h ) graphics=none;;
                t ) tty=console=ttyS0,115200;;
                W ) blocking="";;
                o ) os=$OPTARG;;
                i ) ip=1;;
                : ) echo "-$OPTARG requires an argument" >&2; exit 1;;
                \?) echo "Invalid option: -$OPTARG" >&2; exit 1;;
        esac
done

shift $((OPTIND - 1))

name=$1

if [ "$name" == "" ]; then
	echo "Name required" >&2
	exit 1
fi

if [ -n "$ip" ]; then
	virsh domifaddr \
		--source agent \
		--domain "$name" \
		--interface enp1s0 \
	| awk '/ipv4/ { split($4,a,"/"); print a[1] }'

	exit 0
fi

if [ "$os" == "debian" ]; then
	iso=debian-12.9.0-amd64-netinst.iso
	os_var=debian12
	cfg=preseed.cfg
	cfg_arg=auto=true
elif [ "$os" == "centos" ]; then
	iso=CentOS-7-x86_64-Minimal-1810.iso
	os_var=centos7.0
	cfg=ks.cfg
	cfg_arg=ks=file:/ks.cfg
else
	echo "Invalid OS: '$os'. Valid options: debian, centos" >&2
	exit 1
fi

config=$HOME/.virt-provisioning.json
if [ ! -f "$config" ]; then
	cp config.template.json "$config"
	echo "Please fill in configuration file: $config" >&2
	exit 1
fi

temp_dir=$(mktemp -d)
trap 'rm -rf $temp_dir' EXIT

jinja2 \
	-D "user=$USER" \
	-D "timezone=$(realpath --relative-to /usr/share/zoneinfo /etc/localtime)" \
	-D "fullname=$(getent passwd "$USER" | cut -d : -f 5 | cut -d , -f 1)" \
	"cfg/$os.cfg.j2" \
	"$config" \
	> "$temp_dir/$cfg"

base_dir=$(<"$config" jq --raw-output .host.baseDir)

virt-install \
	--name "$name" \
	--os-variant=$os_var \
	"--ram=$ram" \
	"--vcpus=$cpus" \
	--disk path="$base_dir/images/$storage$name.img,size=$disk" \
	--location "$base_dir/isos/$iso" \
	--network bridge:br0 \
	--graphics $graphics \
	--noautoconsole \
	"$blocking" \
	"--initrd-inject=$temp_dir/$cfg" \
	--extra-args="$cfg_arg hostname=$name domain=$(hostname -d) $tty"